US Bridges

Cth Bb over Killsnake River

Fair

Calumet County, Wisconsin · 1.3M N JCT Cth E · Structure no. P08003000000000

Built
1969
56 years old, rebuilt 1997
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
2,400
2022 count
Owner
County
County Highway Agency

About this bridge

Cth Bb over Killsnake River is a prestressed concrete box beam or girders - multiple carrying Cth Bb over Killsnake River in Calumet County, Wisconsin. It was built in 1969 and reconstructed in 1997, so it is 56 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,400 vehicles a day, projected to reach 173 by 2043. The structure is 48 ft (14.6 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCth Bb
CrossesKillsnake River
Location1.3M N JCT Cth E
RouteCounty Highway 0BB
CountyCalumet County
StateWisconsin
Coordinates44.09194, -88.20389
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating25 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length48 ft (14.6 m)
Longest span46 ft (14.1 m)
Deck width37 ft (11.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2022)
Projected traffic173 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth Bb over Killsnake River built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1997.

What condition is Cth Bb over Killsnake River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does Cth Bb over Killsnake River carry?

About 2,400 vehicles per day (2022 count).

How long is Cth Bb over Killsnake River?

The structure is 48 ft (14.6 m) long with a longest span of 46 ft (14.1 m) and a deck 37 ft wide.

Who owns Cth Bb over Killsnake River?

It is owned by the County Highway Agency.